Pneumatic actuators are the most commonly used valve automation systems. They are economical and utilize compressed air readily available in most plants. They are ideal for quick opening and closing in both on-off and control applications.
QUARTER TURN ROTARY ACTUATORS
Quarter turn rotary actuators are coupled with ball, butterfly, and plug valves, etc.,all of which are quarter turn valves. They are available in two versions: single acting (spring return) and double acting.
Rack and pinion design provides a linear torque characteristic at all travel positions
Suitable for valves requiring constant torque
Scotch yoke design provides high torque at the beginning and end of each operation
Suitable for valves requiring high breakaway and seating torques
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